Improvement in rotary engines



R. B. KIDDER. Rotary Engine.

7 No. 201,113. Patented March 12,1878.

fig. 2.

Wibzesses 1121202207 7 Wfim/ N1 PETERS, FNDTO-LITHOGRAPNER. WASH1NGTON, D C

UNITED STATES PATENT OFFIoE.

RICHARD B. KIDDER, OF COLUMBUS, WISCONSIN.

IMPROVEMENT IN ROTARY ENGINES.

Specification forming part of Letters Patent No. 201,113, dated March 12, 1878; application filed October 28, 187 6.

To all whom it may concern:

Be it known that I, Brennan B. KIDDER, of the town of Columbus, county of Columbia, and State of Wisconsin, have invented an Improvement in Steam-Engines, of which the following is a specification:

The object of my invention is to provide a simple semi-rotary piston which will work on easy bearings without ways, and apply the power directly to the pitman-rod and directly to the valves, as-shown in the accompanying drawings, of which Figure 1 is a front, and Fig. 2 a side, view.

I11 Figs. 1 and 2, A represents the cylinder, having an abutment, B. G is a piston on a shaft in the center of cylinder, having pistonrings a c. D is the crank on the piston-shaft, to which is attached the pitman-rod E. F is a valve-cylinder; G, a rocking valve, which is attached to a crank, H. I is a connectingrod, having a slot in which are set blocks K K, and sliding on crank-pin L. The connectingrod is attached to a crank, M, on piston-shaft, from which it derives its motion. N is the supply-pipe, and 0, Fig. 2, the exhaust.

The piston O is on a shaft passing through the center of the outside cylinder A. The piston consists of a cylinder or section of a cylinder having for its radius the distance from the center of the cylinder A to the inner face of the abutment B. From this section of a cylinder extend piston-wings to the inner surface of the cylinder, (shown at c c,

Fig. 1 or, in a single-acting engine, the two wings may be connected, forming a semi-cylinder. This mode of construction leavestwo separate spaces for the steam-one on each side of the partition B. A rocking valve is placed over the partition, connected by the slotted connecting-rod to the crank M, in such a manner that the close of each stroke of the piston changes the valves.

In Fig. 1 the steam enters through the supplypipe N, and passes around the open valve, into the chamber in the cylinder F. Its expansive force presses the piston around on its bear-.

ings until the block K on the connecting-rod I strikes the valve crank-pin L and changes the position of the valve, when the steam passes into the chamber Q and reverses the motion. The crank D, Fig. 1, applies the force to the pitman-rod E, Fig. 1.

I claim as my invention- The combination of the cylinder A, having abutment B, rotating reciprocating winged piston O 0 c, cranks D M, pitman-rod' E, slotted connecting-rod I, blocks K, crank H, valve G, and cylinder F, with its supply and exhaust ports N 0, all constructed and arranged to operate substantially as herein shown and described.

RICHARD B. KIDDER. 

